From usmle.org:
"Beginning May 22, 2016, USMLE Step 2 Clinical Skills examinees may see a case in which the standardized patient provides a digital image (for example, a photograph, x-ray, MRI, or CT) on a tablet computer. Examinees will be able to enlarge the image. During the pre-session orientation, examinees will have an opportunity to view a sample image on a tablet, and to practice enlarging the image.
Not all examinations will include a case with an image. Examinees will see a maximum of one case with an image per examination."